Systematic position of a rare plant species Scaevola hainanensis  based on ITS sequence analysis

doi:10.13471/j.cnki.acta.snus.2016.01.003

您当前的位置：

首页 >

文章列表页 >

Systematic position of a rare plant species Scaevola hainanensis based on ITS sequence analysis

更新时间：2023-12-11

- Systematic position of a rare plant species Scaevola hainanensis based on ITS sequence analysis
- Acta Scientiarum Naturalium Universitatis SunYatseni Vol. 55, Issue 1, Pages: 16-23(2016)
- 作者机构：
  
  1. 中山大学生命科学学院∥广东省植物资源重点实验室,广东,广州,510275
  2. 
- 作者简介：
- 基金信息：
- DOI：10.13471/j.cnki.acta.snus.2016.01.003
  CLC：
- Published：2016，
  
  Published Online：25 January 2016，
扫描看全文
Systematic position of a rare plant species Scaevola hainanensis based on ITS sequence analysis. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 55(1):16-23(2016)
DOI：

Systematic position of a rare plant species Scaevola hainanensis based on ITS sequence analysis. [J]. Acta Scientiarum Naturalium Universitatis SunYatseni 55(1):16-23(2016) DOI： 10.13471/j.cnki.acta.snus.2016.01.003.

摘要

通过测定来自国内5个分布地点的海南草海桐Scaevola hainanensis Hance群体核核糖体基因间隔区序列（nuclear ribosomal internal transcribed spacer region，ITS)，一方面评估海南草海桐的遗传多样性大小，另一方面，结合GenBank中已有的草海桐属物种ITS序列来共同进行分子系统发育分析，旨在确定海南草海桐在草海桐属中的系统位置。研究结果表明海南草海桐遗传多样性水平极低，作为一种珍稀植物在分子水平上同样面临灭绝的风险。而分子聚类结果发现海南草海桐位于Scaevola组里的北半球谱系，并与夏威夷本地物种的亲缘关系最近，两地草海桐属物种之间可能存在祖先—后代（progenitor-derivative）的扩散模式。研究结果同时否定了Scaevola组的单系性以及海南草海桐由同域广布种草海桐演化而来的假说。

Abstract

Genetic diversity of Scaevola hainanensis Hance is estimated based on the sequences of nuclear ribosomal internal transcribed spacer region (ITS) from five populations distributed in China. Further

phylogenetic analysis of the S. hainanensis is performed based on combined ITS sequences data with other species of Scaevola and outgroups available from GenBank. The results shows that the genetic diversity of S. hainanensis is very low

implying that it is at risk of extinction at the genetic level as a rare plant. In the phylogenetic tree

S. hainanensis is located in the Northern Hemisphere lineage and closest to the clade consisting of local species in Hawaii with high support value

which imply the progenitor-derivative dispersal pattern of Scaevola species between Asia and Hawaii. The results did not support the monophyly of S. sect Scaevola and the hypothesis that S. hainanensis is derived from a widespread and sympatric species S. taccada is rejected based on the present result.

关键词

海南草海桐 Scaevola hainanensis HanceITS系统发育分析

Keywords

references

Views

578

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

No data

Related Author

No data

Related Institution

No data

Postal code：510275
Tel：020-84112585，84113223 Email：xuebaozr@mail.sysu.edu.cn
Technical support is provided by Beijing Founder electronics co., LTD 京ICP备09064830号-19 京公网安备11010802024621
It is recommended to read the content of this site in Chrome&IE9+. Please switch to extreme mode in browser 360.
Cookies We use cookies to help provide and enhance our service and tailor content. By continuing, you agree to the use of cookies.

⁰